/Engine/Source/Runtime/Datasmith/CADKernel/Public/CADKernel/Core/Entity.h
this will eventually be reconciled with what the Geometry team is using.
namespace UE { namespace CADKernel { enum EEntity { None = 0, Curve, Surface, EdgeLink, VertexLink, TopologicalEdge, TopologicalFace, TopologicalLink, TopologicalLoop, TopologicalVertex, Shell, Body, Model, MeshModel, Mesh, Group, Criterion, Property, EntityTypeEnd, } } }